Without any numbers this is hard to calulate
X is minus 2
y is equal to 1
One way:
3x + 4x + 5 x = 30
12 x = 30
Divide by 12
x = 2.5
3x = 7.5 (2.5x3)
4x = 10 (2.5x4)
5x = 12.5 (2.5x5)
7.5cm + 10cm +12.5cm = 30cm There are your three sides.
3. f(-6) = 12+1 =13
f(-2) = 4+1 = 5
f(0) =1
Range {1,5,13}
4. f(-2) = (-2)^3+1 =-7
f(-1) = (-1)^2 +1 =0
f(3) = (3)^3 +1 = 28
Range = {-7,0,28}
5.the sequence is arithmetic
d= -11+19 = 8
an = a1 + d(n-1)
an = -19 +8(n-1)
6.l =w+5
a =l*w
a(w) =(w+5) * w
a(w)= w^2 +5w
f(w) = w^2 +5w
f(8) = 8^2 +5(8)
f(8) = 64 +40
f(8) =104 in^2
It is 50! Hope this helps.
